High speed running t osition



Jan. 27, 1931. B. A. PETERSON WARPING APPARATUS Filed Sept. 11 1929 5 Sheets-Sheet 1 INVENTOR A.Pe terson M M m ATTORNEYS.

Jan. 27, 1931. B. A. PETERSON WARPING APPARATUS I Filed Sept. 11, 1929 s Sheets-Sheet 2 INVENTOR 1 3urt fLPe fierson. I We ATTORNEYS i1 22 awr vg wl B. A. PETERSON WARPING APPARATUS Filed Sept. 11 1929 PLAN 5 Sheets-Shept 5 INVENTOR P Barb A.Peberson ATTORN EYS Jan. 27, 2931 B. A. PETERSON WARPING APPARATUS Filed Sept. 11 1929' 5 Sheets-Sheet 4 HIGH SPEED RUNNING POSITION .iNv 7' UYBurtA.Petenson Y 4 Jimmy ftp/(1% ATTORNEYS Filed Sept.

11, 1929 5 Sheets-Shget 5 ATTORNEYS' the warper may be operated.

Patented Jan. 27, 1931 ,OFFICE BURT A. i n'rnnson', oi noonronn rennet-21s, assz'enon 'r'o BARBER-BOLIVIA}? ooMBANY.

or nocKronnj'iLLmois a QGREOB-ATION OF ILLINOIS V WARPING APPARATUS Application filed September This invention has particular reference to means for guiding the runningyarn,;to means for detecting break ge or excessive slackening'of the yarn, and to means forcontrolling the detectors. 4 y- 1 When drawing yarn oii' the e ids of yari'i masses which are =n mrotatahlymounted, it necessary to provide means to prevent the yarn froinkinking when trio warper or other rewinding mechanismstops, as the yarn unwmds so freely from such yarn masses that kinks formed the time of stoliping will not be straightened out when the warper is again set :in operation. lna certaintprior warp er to which yarn is supplied from cross- Wound conical yarn. masses non-rotatahly mounted, there is a tension-device adjacent to each conical yarnmass w' ich acts upon the thread at all times; This, tension device is eil'ecti-ve to insure that kinks shall be straightened out upon a restarting of the warper, but inasmuch as the tension device acts at all times it limits the speed at which One of the important objects of the present invention is to-provide atension device which shall act only when needed, namelywhen starting the warper, and which consequently places no tension upon the yarn in normal operation of the'machine, and therefore by lessening yarn breakage maltespossible the attainment of amuch higher warping speed.

In the prior art warper just referred to it is impracticable to makethe tension devices uniform in their action, hence they plae'e a varying amount of tension upon the yarn being warped. Since the tension devices of the Warper herein disclosed do not act during normal operation of the wa-rper, there is unis formit-y of tension of the yarn being warped.

In the accompanying drawings:

Figure 1 a fragmental side View of a war-per creel en'llilodying the features of my invention.

Figs. 2 and 3 are fragment-a1 perspective views of one ofthe yarnguidingand detecting units of the creel.

Fig. i is a front elevation of said parts. Fig; 5 atsection on line 5-5 of Fig. 4.

11, 192a Serial NB. 391,796;

v Fig. 5 illustrates the'n'ormal or intermediate pos tion of the'con'trolbar.

Fig. 6 isa plan view showing the rear .por-

tionof the warper and the forward portion.

of the creel.

Fig. 7 is a schematlc view of; the starting chinery for rewinding yarn, I have herein shown the iin-erition in annection with a warper and its creel. nce may he made to my Patent No. '1, :40 dated June 5, 1928, fora disclosure of awarper which may be used in connection with the present inven'tion. y y

I The form of creel selected to illustrate the invention comprises two fra nes each h avin g a bottom member La top memher 2, and a series of wooden posts 3 cormectin; the lnwcz' and upper "frame members 1 and Said creel frames are arrange fl in .-form as indicated in Fig. 6 their adjacent ends heinn' united by a cross-member i-l. Means-is pro vided for supporting a verticalrow of crosswound yarn masses a behind each of the posts '3. Since the present invention does not relate to the details of the 'varnanass supporting means, it will he sufiicient to state that each. yarnmass is non-rotatahly mounted upon mspindlee and that each yarn mass is mounted within a cylindrical casing 5 heri'ng' a closed rear end and an open front end.

The devices 'for guiding the yarn in its course"fromthe cheeses to the warper-nnd the means for detecting exhaustion of the yarn are supported upon the rposts 3. As shown in 1 one edge of'the post 3 ,is-appr-o:-n-'

,mately in the vertical plane of the axes of the row or column of cheeses a. This edge and the adjacent rear corner of the post 3 are covered with sheet metal as shown at 6 in Fig. 2. In passing from the cheese to the detector the yarn runs between the plate 13 and a rod 7, said rod being pivoted at 8 to the upper frame member 2 and extending in front of the vertical row of cheeses to the bottom of the creel. As shown in Fig. 1 the pivot 8 is so located with reference to the post 3 that the rod 7 tends to swing by gravity toward the post 3 into its operative position. The lower end of the rod 7 ext-ends within a stationary frame 9, which prevents displacement of the rod in one direction and permits swinging movement of the rod into the dotted-line position shown in Fig. 1.

Each detector consists of an arm 10 preferably made of a piece of wire bent to form a pivot 11, said pivot being supported in a bearing 12. The arm 10 is in the shape of a loop so as to provide two parallel portions against which the yarn bears. These parallel portions are bent so as to form notches 13 through which the yarn may run. As shown in Figs. 1 and 2 the detector is mounted that when it is in the running position shown in those views, the notches 13 are just below the projected axis of the cheep. The yarn changes direction at the detector and runs to a comb (not shown) on the warper. The tension of the yarn normally holds the arm 10 in contact with a stop portion let (Figs. 2 and 1) against the action of gravity.

Between the detector and the rod 7 the yarn runs through aguide formed of two lingers 15 and 16. These fingers are arranged in parallel closely adjacent vertical planes. The yarn runs between the fingers. As shown in Fig. 2 there is an angular portion 17 which limits downward movement of the yarn. 'llhe finger 16 has a projection 18 that limits upward movement of the yarn. The projection 18 extends past the vertical plane or the ya in- ;ruiding edge of the ting-gel 15'. The upper side of the projection 18 is int-lined so as to allow the yarn to slide down 1 the projection when the yarn being inserteo into the guide, there bein suflicient soace between the finger 15 and said projection to permit the yarn to pass below the projection. Owing to the fact that the projection 18 overlaps or extends past the yarn-guiding edge of the finger 15, the yarn cannot disengage itself from the 'uide fingers 15 and 1s atter having passed bGLOW the projection 18.

in its swinging movements the detector straddles a linger 19 which is like the finger 16, said fingers being located in 'iarallel vertical planes, as shown in Fig. 5. When the detector swings down due to slackening of the yarn, the latter carried a. list the inner edges of said fingers and is thereby drawn into the term of two loops, as shown in Fig. 3.

Parallel with the fingers 16 and. 19 is a guide finger 20 which is a continuation of a guide plate 21 that extends down to the next yarn-guiding unit. he lower portion of said guide plate is cut away at so as to ext-end below the upper part of the next lower guide finger 20, there being a space between the edge 22 and the finger 20 to admit the yarn. For the upper 10st fin ger 20 there is similar .o uidc plate 23.

The linger 1(5 virt ally a continuation of a guide plate which extends to the next lower unit, as shown in the middle portion of Fig. 1. (The guide plate 21 is broken away to expose the guide plate 24;.) A similar guide plate (Fig. 2) is provided for the uppermost finger 15.

As shown in Fig. 1, the detector extends above the fingers 15, 16, 19 and 20, and when in the position illustrated in said view the upper end of the detector lies behind the guide edges of the plates 21 and 2 1 or 23 and as the case may be, so that the yarn annot slip behind the detect r in the operation of associating the yarn with the unit.

The bearing 12 (Figs. 4 and 5) for the pivot of the detector is carried by a metallic attaching portion 26 which also supports the pi rts 14, 15, 16, 19, 20, 21 and 2st. The attachin portion 26 is in contact with a metal oo". ea. 4 in the post 5, said bar being grounded through the creel frame. 7

When the detector falls into the position shown in Fig. 4 an electric circuit is closed to ground, whereby the warper is stopped. Upon the pivot 11 of each detector is mounted a contact arm which is preferably constructed as described in Patent No. 1,53%,055 and is somewhat yieldin The contact arm 28 is arranged to swing into contact with an elc tric conductor in the form of a flat bar 29. All o l. the bar 29 except the upper end thereof is enclosed within the post 3. It will be seen that the contact arm 28 and the courting portion 29 (Fig. l) of the bar constitute an electric switch and that the switch is completely enclosed. The upper ends of the various conductor or control bars 29 are connectcd in any preferred way (herein indicated diagrammatically at 30 in Fig. 7) to one pole of an elccti'omagnetiil. The other pole of the electroinagnet is connected by means of a conductor to a switch 5? which is connected to a ground Ei-Zl. and to the main line ('OIHlHCiOl'F; and 36. 37 is a main line s w i tch.

ll hen a detector falls into the position hown in full lines in Fig. l a circuit is closed 0 ground, thereby energizing the magnet 1:31. whereupon said magnet withdraws a detent that normally renders inoperative the mechanism for throwing out the warper driving clutch and for applying the beam brake. k

The means herein shown for driving and braking the warper is substantially similar to that disclosed in my Patent No. 1,6? 2,47 0, The main drive shaft 38 (Fig. 6) of the warper carries a-drivepulley 39"to which power is communicated through a drive belt 40. 'The "pulley 39 is arrangedto be con nected to the shaft 38 through a clutch 41 which is operated byan oscillatory cam 4-2 fixed to a rock shaft The drive shaft 38 also carries the rotatable element of a friction clutched which "serves to brake'the 'wa'rper, said "brake fbeing operatedby means of an oscillatory 021111425 fixed on the rock shaft The movable ele1nents ot the switch are "mounted on the rock shaft 43. A contractile spring l6 attachedto an arm 47 fixed to the shafts?) tends to turn said shaft in the direction to throw out thedrivc clutch tl apply the-brake Maud open the switch 33. The opening o't'the switch 33 promptly interruptsthe flow of current to ground. The spring 46 is normally 1 restrained by means of a detent 48 whie'his pivoted at 49 and which carries 'anarm'atnre 50 arranged to be attracted by theelectromagnet 31. A contractile spring 51 normally holds the detent 4:8 in contact with a locking segment fixed-uponthe rock shaft 4-8. Said seg- "1i'1e1it is provided with a'shoulder 53 against which the detent- .8 bears when the appara tus is operatingnormally andwith a shoulder 5 lagain's't which-said detent bears when the rock shaft 43 is in its intermediate or brake-releasedposition. v

Means is provided whereby the detectors are operated to place tension on the yarn npoirthe stopping of the warpe'r. Said means comprises a crank arm 55 8) fixed to the rock shaft 43, said armhaving a pin SSth'at'l'ie's within an elongated opening .3? 'in theupper-end of a 11111158. The lower endot-said link is pivoted to a crank arm 59 which is fixed upon ashaft'GO. Fast on said shaft is a weighted hand lever 61, said lever normally holding the upper end wall of the elongated opefin'n g '57 "against the stud 56 (see Fig. 8). il he ends of the shaft 60 are connected hy suitable "means such as gears (32 to rock shafts G3 which are journaled in the creel frame." 011 the shafts 63 arelixed arms 6 "that underlie the control bars 29. an insulator 65 is -interposed!between each arm 64 and its control bar 29*(see Fig. 2).

t will be seen that when the shaft 4-3 is rocked by the spring 46 to stop the warper,

28 hold the detectors in the (as in Fig. 2)

that the Warner is running and ti l breaks, the detector for that thread falls into the position shown in full lines in Fig; 4.

the contact arms 68, whereby the detectors are swung into the yarn-tensio'ning position shown in Fig. 3. Inasmuch as the arms 68 engage'with a vertically extending surface, as 67, it will be apparent that all of the detectors except the one that was associated' warper. Said means comprises a detent arin n. iii?! (59 (Fig. 10) having a shoulder 70 adapted to support'a pin 71 on the weighted hand lever '61; The detent 69 is'pivotedat 72 and is provided with a pedal T3, A spring 74 nor mally holds the detent 69 in Contact with the pin 71 shown in Figs. Sand 10). hen the hand lever (31 is in the full-line position "illustrated in Fig. 10, the control hars29 are in their lowermost position, wherein the surfaces 67 (Fig. 2) acting on the contact arms position inditted in thelast inentionedview. V

The means for operatingthe rock shaft 4 2% to plaoe the w'arper in operation comprises ahand lever f'fi (Fig. .8), said hand lever being. pivoted in the warper iraineivork at 7 A contractile, spring 77 norniallyholds the lever-7 V 10 a lug 78 on the lever being in contact with a lug 79 on the war-per framework. The handlever is connected by ineans of 'a-link 80 to a pivot stud 81 (Figs. 6 and 9) on the segment 52. he stud 81 extends freely through an elongated opening 82 (Fig. 8) in the link 80. r

In order to prevent the warper from ing driven while theid'eteotors are held up against the stops 14 by the control bars Q9 1 provide a locking dog 83 (Fig. '10) pivoted in position to engage a shoulderfid on the locking-segment contractile,spring normally holds the dog 83 out ofthepath of theshoul'd-er 811'.

bntwhile. theweighted hand lever 61 is in 5 in the position shown in Fig.

ibo

the position shown in full lines in Fig. 10, the

dog 83 is held in the path of the shoulder by the dog. 7

The operation is as follows reason of the fact that the upper end oi link 58 engages a projection 86 on said Assuming lat a thread whereupon the electromagnetil (Fig.1 is 'eneigized.thedetent48 is withdrawn from the locking segment 52. and thesprii'ig 46 turns thesh'a ft-43 in the direction to throw 'detent 18 that said shoulder will pa sithe detent before the spring 51 can awn the detent into engagement with the segn'icnt. As the shaft 43 turns to stop the warper the hand lever (l1 drops into the position s :wn in dotted lines in. Fig. 10, thus raising all the control bars 2.) into the position shown in Fig. 3 and thereby causing all the detectors except the one associated with the bro iren thread to swing into the tension position illustrated in that View. The operator then draws forward to the warper the broken end attached to the cheese. the detector for that thread being held up by hand. if necessary, to enable the thread to pass into ogizcrative relation to the detector a. d the guide fingers 15 and 16. The operator then finds the thread end on the beam, to facilitate which the operator may the beam in slow rotation. For this purpose the operator draws the hand lever 75 forward inst far enough to allow the dog 48 to slip under the shoulder hat, the turning movement of the shaft being just suiiicient to release the brake id, but not suificient to throw in the clutch 4-1. The operator then operates a treadle not herein shown) to throw in the clutch 41 sufiiciently to revolve the beam slowly. The movement of the rock shaft 43 to allow the dog a8 to engage the shoulder 54 is not sufi'icient to raise the weighted lever 61 from the yarn-tensionin position shown in, dotted lines in Fig. 10. nor to close the switch After piecing up the broken thread. the operator may, if desired, again set the beam in slow rotation until it is noted that all the threads are running properly. Theoperator then pulls the hand lever 75 forward until the detent 4:8 springs under the shoulder 53, thus turning the rock shaft 4-3 suitcicntly to operate the clutch ll to drive the beam at running speed, said movement of the rock shaft serving to raise the welhted hand lever ($1 into the position shown in Fig. As the lever fil ses the control bars 9.9 descend to the position shown in Fi 5 to allow the detectors to assume the position shown in Figs. 1. 2 and 5 under tension of the running threads. The teeters remain in the tensioning shown in Fig. 3 after the warper only long enough to straighten out any kinks in the yarn.

The warper may be stopped at will by closing a switch 37 (Fig. 7 to close a circuit through the magnet 31 to ground.

Means of any ordinary or preferred character. such a warper clock, may be provided to stop the warper when the desired I J. S

amount of yarn has been wound upon the beam.

The operation of connecting a new set of thread-ends to a beam is as follows: The operator places the lever 61 in the position shown in full lines in Fig. 10, whereby the detectors are raised into the thread-receiving position shown in Fig. 2. The operator then collects the threads of the column of cheeses which is nearest the Warper at, say, the righthand side of the creel, beginning at the top of the column and drawing the thread-ends down to the bottom, the threads twisting t0- ;Iether into a bunch. The operator then draws 'lorw: .'d to the warper a convenient number of bunches of threads, each bunch having previously been inserted into the space between the plate 6 and the rod 7. She then lays the threads into the comb on the warper and connects them to the section beam. As the bunches of threads are drawn to the war-per, the plates 21 and 24 guide the threads into contact with their respective detectors. The threads also slide down below the projections on the fingers 16 and 19, then entering the guide openings formed by the overlapping fingers 15 and 16. After all the threads have been drawn forward to the beam, the operator lowers the lever 61 to the dotted-line position of Fig. 10, thereby placing the detectors in yarn-tensioning position as shown in Fig. The warper is then :ted as hereinbefore described.

The plate 6 and the rod 7 define a vertical slot in which the thread traverses up and down as it balloons off the cheese (see Fig. 2). Since the thr ad traverses only in a vertical line, there is no tendency for the thread to jump out of the guide formed by the fingers 15 and 16; moreover, the cheese may be placed on its spindle either end to, as the balloon may revolve in either direction without causing any difiiculty. The feature of confining the thread so that it can t:'a .'cr;-:c only in a vertical line is thus in'iportant in that it simplifies the loading of the creel and prevents the thread from jumping out of the guide.

It will. be seen that the control bars 29 have three positions, namely, the normal or intermediate position, as shown in Fig. 5, the upper or varn-tensioning position illustrated in Fig. 3, and the lower or threading position reoresented in Fig.

It will be apparent that the construction herein disclosel is well adapted for the attainment of a notable increase in warping speed. The Barber-Colman high speed warper built in substantial accordance with Patents Nos. 1,544,055 and 1,672.4: is being commercially operated at speeds in the neighborhood of five hundred yards per minute. whereas the apparatus herein shown may be operated at speeds upwards of eight hundred yards per minute. Moreover, the warper may i reas s ply yarn masses to limit the rate of acceleration ordeceleration.

This application is a continuation in part i of my application Serial No. 283,244, filed June 6., 1928.

While the present embodiment of the in-- vention has been described in considerable detail, it will be understood that various modifications of details and rearrangements of mechanism maybe made, within the scope of the appended claims, without departing from the spirit of the invention.

I claim as my invention:

1. A creel comprising a row of yarn mass supports, a row of detectors, one for each yarn mass support, an electric conductor bar extending along the row of detectors, said bar having a position wherein it coacts with a fallen detector to close a circuit, another position wherein it holds the remaining de tectors in yarn-tensioning position, and a third position wherein it holds all the detectors elevated, and means for operating said bar.

2. A creel comprising a row of yarn muss supports, a row of detectors, one for each yarn mass support, an electric conductor bar. longitudinally movable along the row of detectors, said bar having means for engage,

ment by said detectors when the latter per-" form their circuit-closing functiomsaid bar also having means to engage thedetectors and move them into yarn-tensioning position, and means automatically actuatedwhen a detector performs its circuit-closing function for moving saidbar to move the detectors into yarn-tensioning position.

3. A creel comprising a row of yarn mass supports, a row otdetectors, one for each yarn mass support, an electric conductor bar longitudinally movable along the row or detectors, said bar being adapted for engage- V ment by said detectors when the latter pore form their detecting function to 'close an electric circuit, said bar also having a seriesv of projections .to engage the detectors and move them into yarn-tensioi1ing position, and means for moving said bar. e

4. A creel comprising a row of yarn mass supports, a row of detectors, one for each yarn mass support, a bar longitudinally movable along the row of detectors, saidlbar hav ing a series of projections thereon to engage the detectors and move them into yarn-tensioning position, and means for moving said bar. i

5. A creel comprising a, row of yarn mass supports, a row of detectorsone for each yarn mass support, each detector having a contact portion, an electric conductor bar longitudinally movablealong the row of detectors, said bar having a series of parts thereon for engagement by said detectors When the latter perform their detecting functlons, said bar also havmga series of parts to move the detectors into yarn-tenslonmg position, means for moving said bar in opposlte d rections, and means enclosmgthe con-7' tact'porti-cns andsaid parts. I a

6. A warper creel comprising a supporting member, a series of detectors pivotally supported on said member, each detector having a contact arm, the detector and the contact arm extending in diiterent directions from their axis of pivotal movement, and a control member slidable longitudinally of itself and 'the supporting memberand adapted to engage all of the contact arms to move the detectors into a certain position. i

7. A warpjer creelcomprising a supporting member, a series of detectors supported 011 said member, and a control member movable longitudinally of itself and the supporting member and enclosed within said member and adapted to engage each of the detec-tors'to move theminto a certain position.

7 8r Awarper creel comprising supports for non-rotatably holding supply yarn masses for the drawing of yarnotf the ends o'fthe yarn masses, detectors on the creel for detect ing exhaustion of the yarn being unwound, and'means for simultaneously placing the de tectors in an intermediate or yarn-tensioning position.

9. The,combination of aplurality or deteeters, for detecting exhaustion ofthe yarn being unwound, and automatically operable means for simultaneously placing the detectors in an intermediate or yarn-ten ioning position, and for simultaneously releasing the detectorsfromsuch position.

10. The combination of a row of pivoted detectors each-having an electric contactarm, the detector and the contact arm; extending in different directions trom their axis of pivotal movement, a control bar extending, along the row of detectors and having'means adaptcdto be engaged by and to engage said contact arms, an enclosure for said cont-act arms and means, and means for moving said control bar. i V

. 11. A creel comprising a row of yarn-mass supports, a row of detectors, one for each yarn-masssupport, means 'coacting with each detector for placing additional tension on the yarn when the detector is moved into yarntensioning relation to said means, and means extending alongthe row of detectors for moving the detectors into such yarn-tensionthe rock shaft in the direction :tothrow out the drive and apply the brake, a locking segment onsaid rock shaft, a detent spring-actut into ngagement with sa d. s g ent, n

electromagnet for witlulrawing the detent from the segment, yarn-controlled means for controlling the electromagnet, and a. lever for turning the rock shaft against the tension of the first mentioned spring, said segment having a shoulder for engagement by said detent when the brake is released and the drive is thrown out, and another shoulder for engagement by said detent when the drive is in. 13. The combination of a warper, a clutch to drive the warper, a brake for the warper, a rock shaft on the warper for controlling the clutch and the brake, means to turn the rock shaft in the direction to throw out the clutch and apply the brake, a locking segment on said rock shaft, a detent spring-actuated into engagementwith said segment, an electromagnet for withdrawing the detent from the segment, yarn-controlled means for controlling the electromagnet, and means for turning the rock shaft in the other direction, said segment having a shoulder for engage ment by said detent when the brake is released and the clutch is thrown out, and another shoulder for engagen'ient by said detent when the clutch is in.

1st. The combination of a warper, a drive for the 'arper, a rock shaft on the warper for controlling the drive, means to turn the rock shaft in the direction to throw out the drive, a locking segment on said rock shaft, a detent spring-actuated into engagement with said segment, an electromagnet for withdrawing the detent from the segment, yarn-controlled means for controlling the elcctromagnet, means to turn the rock shaft in the other direction, said segment having a shoulder for engagement by said detent when the drive is still thrown out, and another shoulder for engagement by said detcnt when the drive is in. r

15. The combination of a warper, a creel, a drive for the warper, a brake for the warper, a rock shaft on the warper for controlling the drive and the brake, a spring tending to turn the rocl; shaft in the direction to throw out the drive and apply the brake, detectors arranged to control the spring, means coacting with each detector for placing additional tension upon the yarn when the detector is moved into yarn-tcnsioning relation to said me: ns, and automatically-actiiated means for moving the detectors into such yarn-tensimiing position upon operation of the spring 16. The con'ibination of a warpcr, a creel, a brake For the warpcr. detectors on the creel arranged to control the brake. means coacting with each detector for placing additional tension upon the yarn when the detector is moved into yarn-tensioning relation to said means, and antomatically-actnated means r'or moving the detectors into such yarn-tensioning position upon application of the brake.

l'(. The combination of a warper, a creel, a drivefor the Warper, a brake for the warper,

means for controlling the drive and the lJlill-(Q, detectors on the creel, and automaticallyactuated means for simultaneously moving the detectors upon operation of the drive and brake controlling means.

18. The combination of a warpcr, a creel, a rock shaft controlling the warp-er, a locking member on said shaft, a dog to engage the locking member to prevent movement of the shaft in the direction to start the warper, a spring tending to withd raw the dog, detectors on the creel, mechanism for holding the detectors in inoperative position, and a connection between said mechanism and said dog to render the latter operative when the detectors are thus held.

19. The combination 01 a warper, locking means to prevent starting of the warper, de tectors for the yarn being wound, mechanism for holding the detectors in inoperative position. and a connection between said mechanism and said locking means to render the latter operative when the detectors are thusl eld.

Q0. The combination of a warper, a creel, detectors on the creel, means for holding the detectors elevated, and means to prevent the arper from being started when the detectors are thus held.

21. The combination of a warper. a creel 'lor non-rotatably supporting supply yarn masses,- means for stopping the warper, and yarn-tensioning means which acts upon the individual yarns at points close to the supply yarn masses and is automatically rendered ettective only upon operation of said stopping means.

22. The combination of a warpor, a creel for non-rotatably supporting supply yarn masses, individual tensioning means for each of. the threads being wound, said means actin upon the threads at points close to the supply yarn masses, means to start the warper, and means actuated in the starting oi" the warper for rendering the tensioning dcviccs inoperative.

23. A creel comprising a row of yarn mass supports, a row oi detectors, one adjacent to each yarn mass support, a control bar of electrical conducting material extending along said rows, each detector having a circuit-closing arm and an arm for moving the detectm' into yarn-tensioning position, said bar having a series of projections, each proiection having a flat longitudinally extending end surtace to engage said arms, and means tor longitiulinally moving said bar to control the detectors.

In testimony whereof, I have hereunto a'l'tfixed my signature.

BURT A. PETERSON.

ill) 

